Method of manufacturing and applying washout-plugs to all steam-boilers.



T. P. HAYES.

METHOD OF MANUFACTURING AND APPLYING WASHOUT PLUGS TO ALL STEAM BOILERS.APILJGATION IEILBD SEPT. 3, 1913.

1 132 260. Patented Mar. 16, 1915.

UNITED STATES PATENT OFFICE.

THOMAS FESTUS HAYES, 0F JACKSON, TENNESSEE, ASSIGNQR 0F TWENTYFOUR ONE-HUNDREDTHS TO HAL HOWARD AND TWENTY-FOUR ONE-HUNDREDTI-IS TO FRANK BONDWILKINSON, OF JACKSON, TENNESSEE.

BOILERS.

Specification of Letters Patent.

Patented Mar. 16, 1915.

Application filed September 3, 1913. Serial No. 188,023.

To all whom it may concern 'Be it known that I, THOMAS FEsTUs' HAYES, acitizen of the United States, residing in Jackson, in the county ofMadison, and the State of'Tennessee, have invented a new and usefulMethod of Manufacturing and Applying WVashout-Plugs to All Steam-Boilers, of which the following is a specification.

This invention relates to washout plugs for steam boilers, and has asits object to provide a plug of such, construction that when properlyapplied to the boiler sheet, it will be united thereto in a firm mannerand sufiiciently tight to provide against leak age and against beingblown out.

The invention incidentally aims, however,

to provide a plug of such construction that it may be readily andconveniently removed whenever it is desired to clean the boiler without,however, disturbing the firm connection of its seat with the boilersheet.

It is one aim of the invention to so construct the seat for the plugproper that the plug will have a maximum area of threaded connectionwith the seat, and in addition to the threaded connection will havemeans cooperating with the seat to provide a water and steam tight fit.vide a water and steam tight fit.

The invention also contemplates the provision of means applicable to theouter end of the plug seat for protecting the plug and preventincorrosion of its threads and the threads 0 the seat.

In the accompanying drawings: Figure l is a sectional view through thewash out plug embodying the present invention, the same being shownapplied. Fig. 2 is a sectional view through the cap of the plug. Fig. 3is a side elevation of the plug. Fig. 4 is a side elevation of the seatfor the plug.

Corresponding and like parts are-referred to in the followingdescription and indicated in all the views of the accompanying drawingsby the same reference characters.

As indicated above, the plug embodying the present invention comprises aseat, a plug proper removably fitted in the seat, and a cap removablyfitted to the seat for the purpose of protecting the plug, and of theseelements, the seat is indicated in general by the numeral 1 and issubstantially of tubular form, it being provided with a' threaded bore 2which is cylindrical and into which is adapted to be fitted the plugproper. Exteriorly the seat 1 is tapered from its middle toward each endand the seat is, therefore, of greater diameter at its middle than atits ends, the taper being indicated by the numeral 3.

Exteriorly the seat is threaded throughout the length of each of itstapered portions, one threaded end being indicated by the numeral 4 andthe other by the numeral 5. The threaded end 4 of the seat is intendedto be permanently fitted into the boiler sheet and the end 5 is adaptedto have fitted to it the cap heretofore referred to.

The plug proper comprises a solid, substantially cylindrical threadedbody 7 which is of a length substantially equal to the length of thethreaded portion of the bore of the seat and at one end the, said bodyis provided with a circumscribing outsanding flange 8 which has itsunder side plane and which has its upper side in a plane with the endface of the plug. The flange 8 is of a diameter to fit snugly againstthe end of the seat and when the plug is threaded into the seat, theflange will rest at its under side against the said end of the seat,whereby to provide a water and steam tight fit between these parts. Forconvenience in applying and removing the plug, it is formed in its saidend with a squared socket 9 into which may be fitted a suitable wrench.

The cap above referred to is indicated by the numeral 10 and isinteriorly threaded, as at 11, and provided upon its closed end 10 witha squared head 13, which may be engaged by a wrench for the purpose ofapplying the cap to and removing the same from the outer end of the seat1.

In applying the plug to a boiler sheet, the

seat 4 is fitted securely at one end inan opening formed in the sheet,and being slightly tapered, it will be securely and permanently held inplace. The plug proper is then fitted into the bore 2 and tighteneduntil its flange 8 bears firmly against the end of the seat, whereby toform a steam and water tight fit. The cap 10 is then threaded onto theouter end of the seat until its closed end 12 bears at its inner faceagainst the outer end edge of the flange 8. It will be apparent that thecap fprotects the plug and prevents corrosion its threads, which wouldbeliable to cause'the plug to stick and therefore be diflicult ofremoval and that it serves also by reason of its en agement with theflange 8 to hold the ange firmly against the end of the seat 1.

By reference to Fig. 1 of the drawings it I will be observed that theouter edge of the flange upon the, plug is snugly engaged by r the innersurface of the cap and that the wall or flange of the cap spans thejunction of the plug, the flange and-the seating end of the .plug,soas-to form a steam tight-connection. I

Having thus described the invention, what isclaimed as new is: a

'1. A wash-out plug for steam boilers com- I prisinga bushing having athreaded bore and exterior threads, the outer end of the bushing beingflat and constituting a seat, a removable plug having exterior threadsengaging the threads of the bore andprovided with a terminal flangebearing against the seat of the bushing, and a cap engaging the exteriorthreads of the bushing and bearing againstthe flange for binding theflange in engagement with the seat.

2. A wash-out plug for steam boilers com-' prising a bushing having athreaded bore, the exterior of the bushing being tapered and threaded,and one end of said bushing being flat and constituting a seat,a'removable, plug having its exterior threaded and.

engaging the threads of the bore, one end of the plug being providedwith a wrench receiving socketand having a laterally extending fiangerovided with a flat lower face adapted to ear against the seat of thebushing, and a cap forming a closure for the outer end of the plug andprovided with a circumferential flange having interior threads for engaement with the exterior rectly with the interior'of the boilernnd havingits walls threaded, the outer end of the bushing being provided with aflatfface an dconstituting a seat, a solid plug having walls of the boreand provided with a terminal flange adaptedto bear againstthe seat forthe plug and provided with an internally threaded'flange engaging theexteriorthreads of the bushin THosi E sf rU s HAYES.

Witnesses: Y J. SCHENVEL,

C. Rlcmuwsonw exterior threads engaging the threaded of the bushing, anda'eapv forming a closure v

